Fixed Voltage Power Supply

The fixed voltage power supply is useful in applications where an adjustable output is not required. This supply is simple, but very flexable as the voltage it outputs is dependant only on the regulator and transformer you choose. The maximum output current is 1.5A.

Schematic

Parts

Part

Total Qty.

Description

Substitutions

C1

1

2200uF 35V Electrolytic Capacitor

C2, C4

2

0.1uF Ceramic Disc Capacitor

C3

1

10uF 35V Electrolytic Capacitor

D1, D2

2

1N4007 Silicon Diode

BR1

1

2A 30V Bridge Rectifier

U1

1

Regulator (See Notes)

T1

1

Transformer (See Notes)

S1

1

SPST 2 Amp Switch

F1

1

2A 250V Fuse and Holder

MISC

1

Heatsink For U1, Line Cord, Case, Wire

Notes

Since this project operates from 120 (or 220, or 240, etc.) volts AC, it MUST be built inside a case.

U1 will reauire a heatsink.

You will need to choose T1 and U1 to match the voltage you want. Use the table below as a reference.

I am involved in a senior project that requires me to build a 6V 1.5A power supply. How can I determine what the values I need for the Fixed Voltage Power Supply schematic that is provided from your website? Your help is very much needed. Thanks.

The 1/2/3 are the pins on the LM78xx.
I have a question though. Since I'm going for 5v out, I imagine that I could replace the LM78xx with the R-785.0-1.0 from RECOM?
Better efficiency but would only have 1A out, for me that's fine as it's only to power USB type devices.

ASSALAM o ALAIKUM!
sir i want the circuit which regulate from 1.2 to 30 but i want that circuit having transformer whose AC input is 220 volt i have seen your circuits in your circuits AC input in the transformer is 120.
plz give me the circuit as soon as possible
i shall be very thank ful to u for this act of kindness

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